L'Oréal Skincare Laboratories developed GLYCOLIC-BRIGHT INSTANT GLOWING SERUM formulated with 1.0% Glycolic Acid. Clinically proven to instantly brighten skin and reduce dark spots. Tested by dermatologists on Asian skin, 10% GLYCOLIC ACID - OUR HIGHEST CONCENTRATION With the smallest molecular weight amongst all Alpha Hydroxy Acids, it penetrates deeply and gently exfoliates skin surface to help accelerate skin's own cell renewal.